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Premium Organic Umami Rice Koji (1 KG)

Premium Organic Umami Rice Koji (1 KG)

The Best Koji for Miso, Shio Koji, Fermented Hot Sauces, and Your Greatest Savory Ferments Yet.

What is Koji Klub?

Koji Klub is for dedicated fermenters. Members will:

  • Get up to 50% off all koji
  • Ferment risk free with Project Protection
  • Skip deliveries or cancel anytime.

Up to 50% OFF your monthly koji deliveries instantly, plus you'll get automatic Project Protection. That means if a fermentation project goes sideways, just send us an email and we'll replace your koji for free - just pay shipping!

Schedule a new koji delivery for every 2 weeks, every month, or every 2 months. Deliveries can be skipped based on need, or cancelled anytime for any reason.

For more info, click here.

Happy fermenting!

  • Satisfaction Guarantee
  • Don't like it? Return it for free!
  • Free Shipping over $49

Product Info:

This premium rice koji is made using heirloom spores—prized for their enzymatic strength and superior umami flavor—from Higuchi Matsunosuke Shoten in Osaka, Japan, and carefully cultivated on certified organic Calrose rice from southern California.

All koji is made by hand at Virginia’s first and only sake brewery -  North American Sake - in Charlottesville, VA.

Build Your Favorite Umami Bombs

We designed this rice koji specifically for professional chefs, fermentation fanatics and casual cooks to:

  • Ferment one-of-a-kind misos
  • Transform meals with fresh shio koji
  • Supercharge sauerkrauts and fermented hot sauces
  • Get funky with homemade garums

Elevate Your Everyday Cooking

Skip the fermentation and use this koji to immediately:

  • Maximize your favorite marinades and dry rubs
  • Tenderize, age, and amplify your proteins
  • Add depth to dressings, soups, and sauces

We believe that well-made koji isn’t just an ingredient. It’s a tool for flavor innovation and a portal to both the deep past and culinary future. Trusted by fermentation wizards, home cooks, and Michelin-star chefs alike, koji is the backbone of Japanese fermentation—and this one’s made to be yours.

Ingredients: Aspergillus oryzae: BF-1 koji kin (Osaka, Japan), Organic medium grain Calrose rice (California, US)

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Start Your Next Project

Organic, purpose-built koji that allows you to explore to the edge of your creativity and beyond.

Elevate Your Menu

Deliver the quality and consistency your guests are expecting by leveraging a koji that let's you instantly enhance the complexity and depth of your best dishes.

Explore the Cutting Edge

Break the mold and discover flavors beyond the mainstream. Adventure into traditional Japanese fermentation, or apply your own flare to make something truly your own.

What makers are saying:

Koji FAQs

Is this koji dry?

Yes! All koji is dried to order after growing to maximize freshness, potency, and shelf life.

What can I make with my koji?

This koji is best for miso, shio koji, marinades, dry rubs, and all things savory. For quick tips and recipe inspo, click here.

It also makes a great gift for that experimental home cook in your life ;)

How long will my koji last on the shelf?

Because all koji is grown and dried fresh, shelf life is up to a year when stored properly. Just check the "USE BY" date on the back of the bag!

How should I store my koji?

All our koji should be stored in a cool, dry place - same as your other pantry staples. No freezing or refrigeration is necessary.

Is it Kosher?

Yes! Our production facility is Kosher certified.

What about allergens?

None! Our koji is 100%:

  • soy free
  • gluten free
  • nut free
  • vegan

Have a special request?

Buying for your retail space, restaurant or next workshop?

We have special rates just for you.

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